body {
    background-color: aquamarine;
}

.icon_01 {
    width: 32px;
    height: 32px;
    background: url(./images/1.png)
}

.icon_02 {
    width: 32px;
    height: 32px;
    background: url(./images/2.png)
}

.icon_03 {
    width: 32px;
    height: 32px;
    background: url(./images/3.png)
}

.icon_04 {
    width: 32px;
    height: 32px;
    background: url(./images/4.png)
}

.icon_05 {
    width: 32px;
    height: 32px;
    background: url(./images/5.png)
}